Not sure mites?

[Appalachian]

The first one was when I got it, The second is the progression of the infection. The third is a dendrobium, I hope someone can diagnose. Thanks for any help you can offer.

There are larger versions in my gallery

[Ross]

Originally Posted by Appalachian

The first one was when I got it, The second is the progression of the infection. The third is a dendrobium, I hope someone can diagnose. Thanks for any help you can offer.

Sorry, I don't see typical signs of mites. I do see some wilt in the last photo, but that could be anything. Mites typically leave white wispy webs on undersides of leaves and if humidity is tyipical for Phals (above 50%) then mites usually aren't the culprit. I agree with nanella and check the roots. Unpot the suspect and check the roots. I know I have been surprised many times with what I found!